package com.sky.service.impl;

import cn.hutool.core.collection.CollStreamUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.BaiduMapCheckUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import java.util.Map;
import java.util.stream.Collectors;

/**
 * @Auther: Tangguo
 * @Date: 2023-04-30  12:52
 * @description: 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private BaiduMapCheckUtil baiduMapCheckUtil;

    @Autowired
    private WebSocketServer webSocketServer;


    /**
     * @param ordersSubmitDTO:
     * @return OrderSubmitVO
     * @description 用户下单
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、超出配送范围、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收货地址是否超出配送范围
        baiduMapCheckUtil.checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        //查询当前用户id
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);



        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList==null||shoppingCartList.size()==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);

        }

        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        //向订单表插入1条数据
        orderMapper.insert(order);

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;



    }

   /**
    * @param ordersPaymentDTO:
    * @return OrderPaymentVO
    * @description 订单支付
    */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception{
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * @param outTradeNo:
     * @return void
     * @description 支付成功，修改订单状态
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        ////////////////////////////////////////////////////////////
        Map map = new HashMap();
        map.put("type", 1);//消息类型，1表示来单提醒
        map.put("orderId", orders.getId());
        map.put("content", "订单号：" + outTradeNo);

        //通过WebSocket实现来单提醒，向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 用户查询历史订单, 订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
     * @param ordersPageQueryDTO:
     * @return PageResult
     */
    public PageResult pageQuery(OrdersPageQueryDTO ordersPageQueryDTO) {
        //设置分页条件
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

        //设置当前用户id，只能查询自己的历史订单
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());

        //调用分页条件查询订单
        Page<Orders> ordersPage=orderMapper.pageQuery(ordersPageQueryDTO);

        // 查询订单详情，封装成OrderVO响应给前端
        List<OrderVO> list = new ArrayList();
        if (ordersPage!= null && ordersPage.getTotal() > 0) {
            for (Orders order : ordersPage) {
                // 查询订单id
                Long orderId = order.getId();
                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                //List<OrderVO> list = new ArrayList();
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }
        return new PageResult(ordersPage.getTotal(), list);
    }

    /**
     * 用户查询订单详情
     * @param id:
     * @return OrderVO
     */
    public OrderVO orderDetail(Long id) {
        return getOrderVOById(id);
    }

    //根据订单id查询订单,并将订单及明细封装到OrderVO返回
    private OrderVO getOrderVOById(Long id) {
        //根据订单id查询订单
        Orders orders = orderMapper.getById(id);
        //通过订单id查询订单明细
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());
        //将订单及明细封装到OrderVO
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }



    /**
     * 用户取消订单
     * @param id:
     * @return void
     */
    public void orderCancel(Long id) throws Exception{
        //根据用户id查询用户订单
        Orders orders = orderMapper.getById(id);
        //订单不存在，无法取消
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //接单的订单无法取消，只能申请退款(订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消)
        if (orders.getStatus() >= 3) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 订单状态待接单=2，需要退款
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            // 先退款
            weChatPayUtil.refund(orders.getNumber(), orders.getNumber(), new BigDecimal(0.01), new BigDecimal(0.01));
            // 支付状态设置成退款
            orders.setPayStatus(Orders.REFUND);
        }
        //可以取消，取消后需要重新更新该订单状态
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason("用户取消订单");
        orders.setStatus(Orders.CANCELLED);
        orderMapper.update(orders);
    }


    /**
     * @param id:订单id
     * @return void
     * @description 用户再来一单
     */
    public void orderRepetition(Long id) {
       //根据订单id查询订单明细
       List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
       //创建购物车集合
       List<ShoppingCart> shoppingCartList= new ArrayList<>();
       //遍历订单明细，加入购物车
        for (OrderDetail orderDetail : orderDetails) {
            //创建购物车
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail,shoppingCart);
            //重新设置用户id和创建时间
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartList.add(shoppingCart);
        }
        //向购物车中插入一批数据
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * @param ordersPageQueryDTO:
     * @return PageResult
     * @description 商家订单搜索
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //开始分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> ordersPage = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orderVOList = getOrderVOList(ordersPage);
        return new PageResult(ordersPage.getTotal(), orderVOList);
    }

    //把Orders封装成OrderVO
    private List<OrderVO> getOrderVOList(Page<Orders> page)   {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 商家各个状态的订单数量统计，订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
     * @return OrderStatisticsVO
     *
     */
    public OrderStatisticsVO statistics() {
        // 根据订单状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed =orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed =orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress =orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO=new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        return orderStatisticsVO;
    }

    /**
     * @param id:订单id
     * @return OrderVO
     * @description 商家查询订单详情
     */
    public OrderVO details(Long id) {

        return getOrderVOById(id);
    }

   /**
    *  商家接单
    * @param ordersConfirmDTO:
    * @return void
    */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        //创建一个新订单
       Orders orders =Orders.builder()
               .id(ordersConfirmDTO.getId())
               .status(Orders.CONFIRMED)
               .build();
       orderMapper.update(orders);
    }

   /**
    * 商家拒单
    * @param ordersRejectionDTO:
    * @return void
    */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception{
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //查询支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders =Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.CANCELLED)
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);

    }

    /**
     * 商家取消订单
     * @param ordersCancelDTO:
     * @return void
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception{
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        // 订单不存在且状态不为1或5，才可以取消
        if (ordersDB == null || ordersDB.getStatus().equals(Orders.COMPLETED)||ordersDB.getStatus().equals(Orders.PENDING_PAYMENT)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //查询支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }

        // 取消需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders =Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.CANCELLED)
                .rejectionReason(ordersCancelDTO.getCancelReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);

    }

    /**
     *  商家派送订单
     * @param id:
     * @return void
     */
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 订单不存在或状态不为3（已接单），不可以派送
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 修改订单状态为派送
        Orders orders =Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id:
     * @return void
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 订单不存在或状态不为4（派送中），不可以点完成
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 修改订单状态为完成
        Orders orders =Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 用户催单
     * @param id:
     * @return void
     */
    public void reminder(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 查询订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 基于WebSocket实现催单
        Map map=new HashMap();
        map.put("type",2);//2代表用户催单
        map.put("orderId",id);
        map.put("content","订单号："+orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));

    }

}
